1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_KERNEL_STAT_H
3 #define _LINUX_KERNEL_STAT_H
6 #include <linux/threads.h>
7 #include <linux/percpu.h>
8 #include <linux/cpumask.h>
9 #include <linux/interrupt.h>
10 #include <linux/sched.h>
11 #include <linux/vtime.h>
15 * 'kernel_stat.h' contains the definitions needed for doing
16 * some kernel statistics (CPU usage, context switches ...),
17 * used by rstatd/perfmeter
34 struct kernel_cpustat {
35 u64 cpustat[NR_STATS];
39 unsigned long irqs_sum;
40 unsigned int softirqs[NR_SOFTIRQS];
43 DECLARE_PER_CPU(struct kernel_stat, kstat);
44 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
46 /* Must have preemption disabled for this to be meaningful. */
47 #define kstat_this_cpu this_cpu_ptr(&kstat)
48 #define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
49 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
50 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
52 extern unsigned long long nr_context_switches(void);
54 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
55 extern void kstat_incr_irq_this_cpu(unsigned int irq);
57 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
59 __this_cpu_inc(kstat.softirqs[irq]);
62 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
64 return kstat_cpu(cpu).softirqs[irq];
68 * Number of interrupts per specific IRQ source, since bootup
70 extern unsigned int kstat_irqs_usr(unsigned int irq);
73 * Number of interrupts per cpu, since bootup
75 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
77 return kstat_cpu(cpu).irqs_sum;
80 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
81 extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
82 enum cpu_usage_stat usage, int cpu);
83 extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
85 static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
86 enum cpu_usage_stat usage, int cpu)
88 return kcpustat->cpustat[usage];
91 static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
93 *dst = kcpustat_cpu(cpu);
98 extern void account_user_time(struct task_struct *, u64);
99 extern void account_guest_time(struct task_struct *, u64);
100 extern void account_system_time(struct task_struct *, int, u64);
101 extern void account_system_index_time(struct task_struct *, u64,
102 enum cpu_usage_stat);
103 extern void account_steal_time(u64);
104 extern void account_idle_time(u64);
106 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
107 static inline void account_process_tick(struct task_struct *tsk, int user)
112 extern void account_process_tick(struct task_struct *, int user);
115 extern void account_idle_ticks(unsigned long ticks);
117 #endif /* _LINUX_KERNEL_STAT_H */